CREATE TABLE IF NOT EXISTS may causes error like Column count doesn't match value count: x (columns) vs y (values)

[lance6716]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. What did you do? If possible, provide a recipe for reproducing the error.
   https://asktug.com/t/topic/92863

   1. at upstream: create table test.t (c int primary key);
   2. start a "all" mode task
   3. at upstream: create table if not exists test.t (c1 int, c2 int); insert into test.t values (1);
   4. query-status

2. What did you expect to see?
   no error

3. What did you see instead?
   gen insert sqls failed, schema: test, table: t: Column count doesn't match value count: 2 (columns) vs 1 (values)"